Disease noticed in French carrots
These rather dry lesions begin as small browny-black dots along the root. They are no more than 2mm deep. They grow up to 1-2cm in size in an irregular form.
Identification was carried out at the INRA station in Rennes and the Ctifl Centre in Lansade where they found it to be a grey-green fungus which grows very slowly in Petri dishes and resembles Rhexocercosporidium carotae.